SIST EN ISO 844:2009
(Main)Rigid cellular plastics - Determination of compression properties (ISO 844:2007)
Rigid cellular plastics - Determination of compression properties (ISO 844:2007)
This International Standard specifies a method of determining
a) the compressive strength and corresponding relative deformation
or
b) the compressive stress at 10 % relative deformation
and
c) when desired, the compressive modulus of rigid cellular plastics.
Harte Schaumstoffe - Bestimmung der Druckeigenschaften (ISO 844:2007)
Diese Internationale Norm legt ein Verfahren fest, mit dem für harte Schaumstoffe folgende Werkstoffkenn-werte zu bestimmen sind:
a) die Druckfestigkeit und die entsprechende Stauchung
oder
b) die Druckspannung bei 10 % Stauchung
und
c) wenn gewünscht, der Kompressionsmodul.
Plastiques alvéolaires rigides - Détermination des caractéristiques de compression (ISO 844:2007)
L'ISO 844:2007 spécifie une méthode de détermination
a) de la résistance à la compression et de la déformation relative correspondante
ou
b) de la contrainte en compression à 10 % de déformation relative
et
c) lorsque cela est souhaitable, du module de compression
des plastiques alvéolaires rigides.
Penjeni polimerni materiali - Trde pene - Določevanje lastnosti stiskanja (ISO 844:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 844:2009
01-oktober-2009
1DGRPHãþD
SIST ISO 844:2003
3HQMHQLSROLPHUQLPDWHULDOL7UGHSHQH'RORþHYDQMHODVWQRVWLVWLVNDQMD ,62
Rigid cellular plastics - Determination of compression properties (ISO 844:2007)
Harte Schaumstoffe - Bestimmung der Druckeigenschaften (ISO 844:2007)
Plastiques alvéolaires rigides - Détermination des caractéristiques de compression (ISO
844:2007)
Ta slovenski standard je istoveten z: EN ISO 844:2009
ICS:
83.100 Penjeni polimeri Cellular materials
SIST EN ISO 844:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 844:2009
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SIST EN ISO 844:2009
EUROPEAN STANDARD
EN ISO 844
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 83.100
English Version
Rigid cellular plastics - Determination of compression properties
(ISO 844:2007)
Plastiques alvéolaires rigides - Détermination des Harte Schaumstoffe - Bestimmung der Druckeigenschaften
caractéristiques de compression (ISO 844:2007) (ISO 844:2007)
This European Standard was approved by CEN on 30 May 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 844:2009: E
worldwide for CEN national Members.
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SIST EN ISO 844:2009
EN ISO 844:2009 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 844:2009
EN ISO 844:2009 (E)
Foreword
The text of ISO 844:2007 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 844:2009 by
Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2009, and conflicting national standards shall be withdrawn
at the latest by December 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 844:2007 has been approved by CEN as a EN ISO 844:2009 without any modification.
3
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SIST EN ISO 844:2009
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SIST EN ISO 844:2009
INTERNATIONAL ISO
STANDARD 844
Fifth edition
2007-04-15
Rigid cellular plastics — Determination of
compression properties
Plastiques alvéolaires rigides — Détermination des caractéristiques de
compression
Reference number
ISO 844:2007(E)
©
ISO 2007
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SIST EN ISO 844:2009
ISO 844:2007(E)
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ii © ISO 2007 – All rights reserved
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SIST EN ISO 844:2009
ISO 844:2007(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Symbols and abbreviated terms . 2
5 Principle. 2
6 Apparatus . 3
7 Test specimens . 3
8 Procedure . 4
9 Expression of results . 5
10 Precision. 7
11 Test report . 7
© ISO 2007 – All rights reserved iii
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SIST EN ISO 844:2009
ISO 844:2007(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 844 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This fifth edition cancels and replaces the fourth edition (ISO 844:2004), which has been revised to include a
choice of conditioning atmospheres (see 7.4).
iv © ISO 2007 – All rights reserved
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SIST EN ISO 844:2009
INTERNATIONAL STANDARD ISO 844:2007(E)
Rigid cellular plastics — Determination of compression
properties
1 Scope
This International Standard specifies a method of determining
a) the compressive strength and corresponding relative deformation
or
b) the compressive stress at 10 % relative deformation
and
c) when desired, the compressive modulus
of rigid cellular plastics.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 1923, Cellular plastics and rubbers — Determination of linear dimensions
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
relative deformation
ε
ratio of the reduction (in relation to its initial value) in thickness of the test specimen to its initial thickness
NOTE 1 It is expressed as a percentage.
NOTE 2 ε is the relative deformation corresponding to σ (see 3.2).
m m
3.2
compressive strength
σ
m
maximum compressive force F divided by the initial cross-sectional area of the test specimen when the
m
relative deformation ε is < 10 %
© ISO 2007 – All rights reserved 1
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SIST EN ISO 844:2009
ISO 844:2007(E)
3.3
compressive stress at 10 % relative deformation
σ
10
ratio of the compressive force F at 10 % relative deformation ε to the initial cross-sectional area of the test
10 10
specimen
3.4
compressive modulus of elasticity
E
compressive stress divided by the corresponding relative deformation below the proportional limit, i.e. when
the relation is linear
4 Symbols and abbreviated terms
A initial cross-sectional area, in square metres
0
E compressive modulus of elasticity, in kilopascals
F force corresponding to x (conventional proportional limit), in newtons
e e
F maximum force, in newtons
m
F force at 10 % relative d
...
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